diff -r b7727edd44f2 -r 10f3b3286e63 lemon/dinitz_sleator_tarjan.h
--- a/lemon/dinitz_sleator_tarjan.h	Wed Nov 28 17:51:02 2007 +0000
+++ b/lemon/dinitz_sleator_tarjan.h	Wed Nov 28 18:01:38 2007 +0000
@@ -213,6 +213,12 @@
       }
     };
 
+  protected:
+    
+    DinitzSleatorTarjan() {}
+
+  public:
+
     /// \brief The constructor of the class.
     ///
     /// The constructor of the class.